Device for desiccating liquid substances



July 15, 1924. 1,501,875

F. \NREEsMANN DEVICE FOR DESICCATING LIQUID SUBSTANCES Filed April 22 1924 Ga Exit gnvewl'oz Inlet F. \Nr'eesmann.

Patented July 15, 1924.

FERDINAND WBEESMANN, OF MUNICH, GERMANY.

DEVICE FOR DESICGATING LIQUID SUBSTANCES.

Application filed April 22, 1924. Serial No. 708,304.

To all whom it may concern:

Be it known that IyFERDINAND WREEs- MANN, a citizen of Germany, residing at Munich, in the State of Bavaria, Germany,

haveinvented certain new and useful Improvements in or Relating following is a specification.

This invention relates to a method and device for desiccating liquid substances.

The essential advantages attained by the invention are the following: A far-carrying layer of desiccating agent (e. g., hot air or other drying gas) which, in the form and direction of flow with which the same is provided, comes into contact with the atomized liquid substance under treatment (i. e., liquid to be dried), immediately as the latter leaves the atomizing device, and remains in contact therewith upon the whole course of suspension and fall of the liquid being dried, so that the short periodof suspension of the particles of liquid is completely utilized. In the second place 2 the effect of the desiccating agent occurs while the liquid particles are being projected at about right angles to the direction of flow of the drying agent with which it comes into contact, whereby contact with and penetration of the layer of liquid occurs in a continuous and thorough manner, so that complete utilization of the desiccating effect of the blast is secured, and on account of the absence of eddy-currents, a very uniform drying.

These advantages are attained by the fact that the liquid is spread out in known manner into the form of a horizontal layer of finely-atomized particles, this being preferably effected by centrifugal force from acentral point within the evaporating chamber which has a circular or polygonal crosssection. The desiccating agent (e. g., hot air) is introduced at two points from below this layer, and the used desiccating agent is expelled above the atomizing zone, in such manner that the same constitutes a rising circulating (rotating) layer filling the whole cross-section of the evaporation chamber, supporting the atomized liquid particles, remaining in contact therewith through the whole course of suspension and to a Device for Desiccating Liquid Substances, of which the fall thereof, penetrating the layer of liquid particles upon a circular path of considerable length, and thereby extracting the volatile constituents to the desired degree.

The drawing shows diagrammatically one form of embodiment, by way of example, for carrying out my process.

Fig. 1 is a vertical section, and

Fig. 2 is a top plan view, with the top or cover of the evaporation chamber removed.

a is the cylindrical drying or evaporating chamber, in the centre of which is provided a vertical cylindrical column b, carrying at its top the atomizing device, for example a rapidly rotating dish shaped device c for atomizing the liquid introduced through the pipe d. An annular space is formed between the side wall of the drying chamber and the column b, underneath the layer of atomized liquid. Into this space is conducted the desiccating agent, for examplehot air, through the tangential passages e. The inlet slots 7 are directed horizontally. or preferably are very slightly upwardly inclined, and extend from the central column b to the wall of the chamber Hence the streams of hot air will rise in the annular space in a helical course, and will have a tendency to fill the whole horizontal cross-section of the evaporating chamber, as a uniform How of drying gas.

The used drying agent, say air, is led away through the flue g, which should be connected to the evaporating chamber at a point well above the level of the atomizer c. Thecentrifugal atomizer c is rotated at v a high speed in any suitable manner, for example by a belt on pulley it carried by shaft 2'. The dried material in powder form drops to the bottom of the chamber a, and can be withdrawn therefrom in any suit able manner, say through the door 70.

What is claimed as new, and desired to be secured by Letters Patent is In an apparatus for desiccating solids contained in liquids by evaporation, the

combination of a substantially cylindricalenclosed evaporating chamber, a vertical cylindrical column seated centrally on the bottom thereof and terminating a substantial distance below the top of said chamber, 7

@ mem m a centrifugal atomizer supported at the top In testimon whereof I have afixed my of said coluzgn, andd two 0 positely and signature in t e presence of two witnesses.

tan entiall irecte air con uits entering said chsumh er on opposite sides of said 001- FERDINAND H EESMANN' 5 umn the open end of each being upwardly Witnesses:

inclined and extending laterall from said WLAD. ENDERS,

column to the wall of said chain 2'. ROGER S. AUSPACE. 

